The Lancaster Stereo Instantograph is a British wood-and-brass stereo plate camera from the late Victorian era, made by J. Lancaster & Son of Birmingham. It produced paired images on a single plate for stereoscopic viewing, a popular format in the 1880s and 1890s when Lancaster's Instantograph series was sold as a general-purpose field camera.

Auction data for the Stereo Instantograph is very thin: the only recorded UK saleroom result we hold is a Christie's hammer of £747 from January 1999, so any view of what the camera is worth today rests on a single wholesale data point rather than a current market trend. Condition of the wood, bellows and brassware, together with the presence of original plate holders and a working shutter, drives most of the value variance for surviving examples.